To find the distance between two numbers on the number line, you can subtract one number from the other and take the absolute value of the result.
In this case, the two numbers are \( 18.25 \) and \( -7.4 \).
The distance \( d \) can be calculated as follows:
\[ d = |18.25 - (-7.4)| = |18.25 + 7.4| \]
Now, perform the addition:
\[ 18.25 + 7.4 = 25.65 \]
Therefore, the distance between \( 18.25 \) and \( -7.4 \) is \( 25.65 \).